I saw this last night. My husband is a film expert (both video and still), after watching the clip once, he said that it was totally fake. If not a "simple" puppet on a string, Chroma Key technique could have easily been used to create this.

As a Psych. major myself, I do have to say that, if a team of "investigators" is going to look into paranormal "phenomena", the investigations and findings would be far more credible, if said investigators weren't prone to believing in Ghosts, Aliens, Goblins...etc.